CN108414686B - Test device for simulating longitudinal-transverse nonlinear supporting rigidity of foundation - Google Patents
Test device for simulating longitudinal-transverse nonlinear supporting rigidity of foundation Download PDFInfo
- Publication number
- CN108414686B CN108414686B CN201810117710.0A CN201810117710A CN108414686B CN 108414686 B CN108414686 B CN 108414686B CN 201810117710 A CN201810117710 A CN 201810117710A CN 108414686 B CN108414686 B CN 108414686B
- Authority
- CN
- China
- Prior art keywords
- transverse
- longitudinal
- nonlinear
- transverse sliding
- sliding block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a test device for simulating the longitudinal-transverse nonlinear support stiffness of a foundation, which belongs to the technical field of pile foundation engineering and comprises an inner cylinder and an outer cylinder with open top ends, a torsional nonlinear support module, a transverse nonlinear support module and a longitudinal nonlinear support module; the inner cylinder is sleeved in the outer cylinder and can longitudinally move in the outer cylinder; the torsional nonlinear supporting module comprises a tray, a gear, a first transverse sliding groove, a sleeve box, a first transverse sliding block and a toothed bar; the transverse nonlinear supporting module comprises a longitudinal sliding chute, a longitudinal sliding block, a separating box and a transverse loading rod; the longitudinal nonlinear support module comprises a second transverse sliding chute, a second transverse sliding block and a longitudinal loading rod. The invention realizes the simulation of the vertical-horizontal nonlinear support of the foundation on the upper structure upright column, and provides a bottom support condition for developing an indoor model test of an upper support structure (such as an offshore jacket and a pile structure).
Description
Technical Field
The invention relates to the technical field of pile foundation engineering, in particular to a test device for simulating longitudinal-transverse nonlinear bearing stiffness of a foundation.
Background
At present, the column end of the upright column of the superstructure is usually separated from the foundation (namely the bottom is considered to be fixed) by a structural model test, and the combined action of the superstructure and the foundation is ignored to be considered as an independent structure. However, in actual engineering, the upper structure and the foundation always work together, and the upper structure and the foundation are an integral body which is not separable. The upper structure and the foundation are divided, stress is considered and calculated respectively, and for a small building or a simple structure, the error does not influence the structure safety or increase the manufacturing cost generally. However, for the buildings with large scale, various loads and complicated superstructure, the method only satisfying the static balance condition without considering the interaction between the two will cause large errors. In the upper structure model test, such as high-rise buildings, bridges, offshore jackets and other structures, the bottom upright posts are often directly connected with the ground of a laboratory and are regarded as ideal embedding conditions, and the actual supporting effect of the foundation on the structure is ignored. Since the foundation itself (e.g. pile foundation) and the underlying soil layer are compressed and deformed during the process of building the superstructure, which is equivalent to placing the structure on the spring support, there may be large errors assuming an ideal bottom-fixing condition. When the rigidity of the foundation is considered, the bottom surface of the foundation rotates under the action of horizontal load, the self-vibration period of the structure is prolonged, and the vertex displacement is increased. Particularly, for a high-rise building structure with a large height-width ratio, the lateral rigidity plays a role in controlling, and the influence of the foundation rigidity on the seismic performance of the structure is particularly obvious. Therefore, in the structural model test, it is necessary to consider the influence of the foundation support stiffness on the mechanical properties of the superstructure.
The Chinese invention patent CN106500959A discloses a device for simulating marine environmental load, which directly connects a conduit leg with a rectangular concrete foundation through a bolt. In the device, the pile foundation is directly simplified into a box body structure formed by welding a steel plate and a steel structure, so that the supporting effect of the foundation on an upper structure is weakened. In summary, in the current structural model test, there is only a test device considering the foundation for the superstructure support.
Disclosure of Invention
The invention aims to provide a test device for simulating longitudinal-transverse nonlinear supporting rigidity of a foundation, which considers the actual supporting function of a foundation at the bottom of a structure and the nonlinearity of the supporting rigidity of the foundation so as to simulate the supporting of the foundation on an upper structure.
The invention provides a test device for simulating the rigidity of a longitudinal-transverse nonlinear support of a foundation, which comprises an inner cylinder and an outer cylinder with open top ends, a torsional nonlinear support module, a transverse nonlinear support module and a longitudinal nonlinear support module, wherein the torsional nonlinear support module is arranged on the inner cylinder; the inner cylinder is sleeved in the outer cylinder and can longitudinally move in the outer cylinder; the torsional nonlinear supporting module comprises a tray, a gear, a first transverse sliding groove, a sleeve box, a first transverse sliding block and a toothed bar; the tray is arranged in the inner cylinder in a rolling manner and is used for fixing the upper structure upright post; the gear is fixedly sleeved on the tray; the number of the first transverse sliding chutes is two, the first transverse sliding chutes are symmetrically arranged in the inner cylinder by taking the central line of the upper structural upright post as a symmetry axis, and the opening of the first transverse sliding chutes faces the upper structural upright post; the side face of the sleeve box close to the upper structure upright post and the side face of the sleeve box far away from the upper structure upright post are provided with through holes, and the two sleeve boxes are connected through a connecting rod and are arranged in the same first transverse sliding groove in a sliding manner; the curved surfaces of the two first transverse sliding blocks are oppositely arranged and are connected with the inner wall of the sleeve box through springs, and the first transverse sliding blocks extend out of through holes in the side face, far away from the upper structure upright post, of the sleeve box and are in contact with the first transverse sliding grooves; the toothed bar is meshed with the gear through a sawtooth part on the bar body, two ends of the toothed bar extend into the sleeve box from a through hole on the side surface of the sleeve box close to the upper structure upright post, and a hemispherical tamping head used for extruding the first transverse sliding block is arranged; the transverse nonlinear supporting module comprises a longitudinal sliding chute, a longitudinal sliding block, a separating box and a transverse loading rod; the longitudinal sliding grooves are symmetrically arranged in the inner cylinder by taking the central line of the upper structure upright post as a symmetry axis, and the openings of the longitudinal sliding grooves face the upper structure upright post; the curved surfaces of the two longitudinal sliding blocks are oppositely arranged and are connected with the inner wall of the longitudinal sliding chute through a spring; the separation box is sleeved on the upper structure upright post; the first end of the transverse loading rod is fixed on the separation box, and the second end of the transverse loading rod is provided with a hemispherical tamping head for extruding the longitudinal sliding block; the longitudinal nonlinear supporting module comprises a second transverse sliding groove, a second transverse sliding block and a longitudinal loading rod; the second transverse sliding chute is arranged in the outer barrel, and the opening of the second transverse sliding chute faces to the bottom of the inner barrel; the curved surfaces of the two second transverse sliding blocks are oppositely arranged and are connected with the inner wall of the second transverse sliding chute through a spring; the first end of the longitudinal loading rod is fixed at the bottom of the inner cylinder, and the second end of the longitudinal loading rod is provided with a hemispherical tamping head used for extruding the second transverse sliding block.
Further, the bottom surface of the tray is provided with a downward convex annular barrier layer; and balls are arranged in a space enclosed by the annular barrier layer and the bottom of the inner cylinder.
Further, the top surface of the tray is provided with an annular mounting portion protruding outward for connection with the gear.
Furthermore, the first transverse chute and the sleeve box are rectangular box bodies; pulleys are arranged on the side surface of the sleeve box, which is in contact with the inner wall of the first transverse sliding groove, the side surface of the first transverse sliding block, which is in contact with the inner wall of the sleeve box, and the side surface of the first transverse sliding block, which extends out of the sleeve box and is in contact with the inner wall of the first transverse sliding groove; the inner walls of the first transverse sliding groove and the sleeve box are provided with sliding ways matched with the pulleys.
Furthermore, the longitudinal sliding groove is formed by enclosing a first baffle arranged in the inner cylinder, the bottom of the inner cylinder and the side wall of the inner cylinder positioned between the first baffle and the bottom of the inner cylinder; the springs arranged in the longitudinal sliding groove comprise a first spring and a second spring, two ends of the first spring are respectively connected with the first baffle and the longitudinal sliding block, and two ends of the second spring are respectively connected with the bottom of the inner cylinder and the longitudinal sliding block; and a pulley is arranged on the side surface of the longitudinal sliding block facing the side wall of the inner cylinder.
Furthermore, the second transverse chute is formed by enclosing two second baffles which are oppositely arranged at the bottom of the outer barrel and the bottom of the outer barrel which is positioned between the two second baffles; the bottom of the second transverse sliding block is provided with a pulley; a slideway matched with the pulley of the second transverse sliding block is arranged at the bottom of the outer barrel between the two second baffles.
Further, the inner wall of the outer cylinder is provided with a side wall roller which is in rolling contact with the outer wall of the inner cylinder.
Further, the cross sections of the inner cylinder and the outer cylinder are rectangular; the number of the longitudinal nonlinear supporting modules is four, and the longitudinal nonlinear supporting modules are respectively arranged at four corners of the rectangle.
Further, the test device for simulating the longitudinal-transverse nonlinear supporting rigidity of the foundation also comprises a cover plate for closing the opening of the outer cylinder; the cover plate is provided with a through hole for the upright post of the upper structure to pass through.
Furthermore, the inner circumferential surface of the separation box is matched with the outer circumferential surface of the upper structure upright post, and the separation box comprises two separable box bodies; the two boxes are symmetrically sleeved on the upper structure upright post by taking the central line of the upper structure upright post as a symmetry axis and are connected through split bolts.
Compared with the prior art, the invention has the advantages that:
1. the upper structure upright post is longitudinally and/or transversely displaced under the action of load, the longitudinal loading rod is respectively driven to extrude the second transverse sliding block and the transverse loading rod to extrude the longitudinal sliding block, and the spring is compressed, so that the simulation of the longitudinal-transverse nonlinear support of the upper structure upright post by the foundation is realized, and a bottom support condition is provided for developing an indoor model test of an upper support structure (such as an offshore jacket and a pile bearing structure);
2. by using the matching of the gear and the rack in the torsional nonlinear supporting module, the torsional motion is skillfully converted into the motion along a horizontal straight line, and an idea is provided for the development of a test for applying a horizontal eccentric load to an upright column of an upper structure;
3. the rock-soil system often is nonlinear mechanical characteristics, and linearity is only a simplification to nonlinearity, and the side face that first horizontal slider, vertical slider and second horizontal slider and hemisphere are smash the head contact in this device is the curved surface for this device can simulate the nonlinearity of basic support rigidity, and the simulation operating condition that can be more accurate improves the similarity of experiment and operating condition.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a top view of a test rig for simulating fundamental longitudinal-transverse nonlinear bearing stiffness provided in example 1 of the present invention;
FIG. 2 is a sectional view in the direction A-A of the test device shown in FIG. 1;
FIG. 3 is a sectional view in the direction B-B of the test apparatus shown in FIG. 1;
FIG. 4 is an enlarged view of the torsional nonlinear bearing module of the test apparatus of FIG. 1;
FIG. 5 is a mating view of the first transverse runner, the cartridge, and the first transverse slider of the torsional nonlinear bearing module illustrated in FIG. 4;
FIG. 6 is a floor plan of the test apparatus shown in FIG. 1;
FIG. 7 is a force analysis diagram of the first lateral slider simplified as a ramp slider in embodiment 2;
FIG. 8 is a plot of the first lateral slider of example 2 as a function ofy=x 2Of the hourA stress analysis chart;
FIG. 9 is a plot of the first lateral slider of example 2 as a function ofx 2 +y 2 =a 2 Force analysis graph of time.
Reference numbers: 10-an inner cylinder; 20-outer cylinder; 21-side wall rollers; 22-a cover plate; 31-a tray; 32-gear; 33-a first transverse chute; 34-a kit; 35-a first transverse slide; 36-toothed bar; 37-a connecting rod; 38-a ball bearing; 41-longitudinal slide block; 42-a separation tank; 43-a transverse loading bar; 44-a first baffle; 51-a second lateral slider; 52-longitudinal load bar; 53-a second baffle; 60-a spring; 71-a pulley; 72-a slide; 100-superstructure columns.
Detailed Description
Example 1
The embodiment provides a test device for simulating the stiffness of a foundation longitudinal-transverse nonlinear support, which comprises an inner cylinder 10 and an outer cylinder 20 with open top ends, a torsional nonlinear support module, a transverse nonlinear support module and a longitudinal nonlinear support module, as shown in fig. 1 to 3; the inner cylinder 10 is sleeved in the outer cylinder 20 and can move longitudinally in the outer cylinder 20; the torsional nonlinear support module comprises a tray 31, a gear 32, a first transverse sliding groove 33, a sleeve box 34, a first transverse sliding block 35 and a toothed bar 36; the tray 31 is arranged in the inner cylinder 10 in a rolling manner and used for fixing the upper structure upright 100, and after the upper structure upright 100 is fixed on the tray 31, the upper structure upright and the tray do not move relatively in the movement process; the gear 32 is fixedly sleeved on the tray 31 and moves together with the tray 31; the number of the first transverse sliding chutes 33 is two, and the first transverse sliding chutes are symmetrically arranged in the inner cylinder 10 by taking the central line of the upper structural upright 100 as a symmetry axis and have openings facing the upper structural upright 100; the inner side (the side close to the upper structure column) and the outer side (the side far away from the upper structure column) of the sleeve boxes 34 are provided with through openings, and the two sleeve boxes 34 are connected through a connecting rod 37 and are arranged in the first transverse sliding groove 33 in a sliding manner; the curved surfaces of the two first transverse sliding blocks 35 are oppositely arranged and are connected with the inner wall of the sleeve box 34 through springs 60, and the first transverse sliding blocks 35 extend out of the through holes on the outer side surface of the sleeve box 34 and are in contact with the first transverse sliding grooves 33; the toothed bar 36 is meshed with the gear 32 through a sawtooth part on the bar body, two ends of the toothed bar extend into the sleeve box 34 from a through hole on the inner side surface of the sleeve box 34, and a hemispherical tamping head used for extruding the first transverse sliding block 35 is arranged; the transverse nonlinear supporting module comprises a longitudinal sliding groove, a longitudinal sliding block 41, a separation box 42 and a transverse loading rod 43; the longitudinal sliding grooves are symmetrically arranged in the inner cylinder 10 by taking the central line of the upper structural upright 100 as a symmetry axis and have openings facing the upper structural upright 100; the curved surfaces of the two longitudinal sliding blocks 41 are oppositely arranged and are connected with the inner wall of the longitudinal sliding chute through a spring 60; the separation box 42 is sleeved on the upper structure upright 100; the first end of the transverse loading rod 43 is fixed on the separation box 42, and the second end is provided with a hemispherical tamping head for extruding the longitudinal sliding block 41; the longitudinal nonlinear support module comprises a second transverse sliding chute, a second transverse sliding block 51 and a longitudinal loading rod 52; the second transverse sliding chute is arranged in the outer cylinder 20, and the opening of the second transverse sliding chute faces to the bottom of the inner cylinder 10; the curved surfaces of the two second transverse sliding blocks 51 are oppositely arranged and are connected with the inner wall of the second transverse sliding chute through a spring 60; the longitudinal loading rod 52 has a first end fixed to the bottom of the inner cylinder 10 and a second end provided with a hemispherical tamper head for pressing the second lateral slider 51.
Horizontal eccentric load is applied to the upper structure upright 100 to drive the tray 31 to rotate, under the matching of the gear 32 and the rack 36, the hemispherical tamping head on the rack 36 extrudes the first transverse sliding block 35, so that the sleeve box 34 and the first transverse sliding block 35 move along the first transverse sliding groove 33, and by the arrangement, when the first transverse sliding block 35 is directly connected with the first transverse sliding groove 33, the first transverse sliding groove 33 applies acting force to the first transverse sliding block 35 through the spring 60 to influence the stress of the first transverse sliding block 35, so that the stress of the first transverse sliding block 35 is as close to the stress of the upper structure upright 100 as possible.
In order to realize the rolling of the tray 31, universal wheels can be arranged at the bottom of the tray 31, and in the embodiment, as shown in fig. 2 or fig. 3, the bottom surface of the tray 31 is provided with a downward convex annular barrier layer; the ball 38 is arranged in the space enclosed by the annular barrier layer and the bottom of the inner barrel 10, so that the structure of the whole device is simplified, and the installation is more convenient. To extend the service life, the balls 38 are steel balls.
Further, as shown in fig. 2 or 3, the top surface of the tray 31 is provided with an annular mounting portion protruding outward for connection with the gear 32. The gear 32 may be bolted to the annular mounting portion.
Further, as shown in fig. 4 and 5, the first lateral sliding groove 33 and the sleeve 34 are each a rectangular box body; the side face of the sleeve box 34 contacted with the inner wall of the first transverse sliding groove 33, the side face of the first transverse sliding block 35 contacted with the inner wall of the sleeve box 34 and the side face of the first transverse sliding block 35 extending out of the sleeve box 34 and contacted with the inner wall of the first transverse sliding groove 33 are all provided with pulleys 71; the inner walls of the first transverse sliding grooves 33 and the inner walls of the sleeve boxes 34 are provided with sliding ways 72 matched with the pulleys 71. The friction resistance of the sleeve 34 and the first transverse sliding block 35 in the sliding process is reduced through the cooperation of the pulley 71 and the sliding channel 72, the sliding tracks of the sleeve 34 and the first transverse sliding block 35 are limited, the sliding process is ensured not to be deviated, and in addition, the pulley 71 of the side surface of the first transverse sliding block 35, which extends out of the sleeve 34 and is in contact with the inner wall of the first transverse sliding groove 33, is also used for supporting the first transverse sliding block 35.
Further, in order to simplify the structure of the device, as shown in fig. 2, the longitudinal sliding groove is enclosed by a first baffle 44 arranged in the inner cylinder 10, the bottom of the inner cylinder 10 and the side wall of the inner cylinder 10 between the first baffle 44 and the bottom of the inner cylinder 10; the spring 60 arranged in the longitudinal sliding groove comprises a first spring and a second spring, wherein two ends of the first spring are respectively connected with the first baffle 44 and the longitudinal sliding block 41, and two ends of the second spring are respectively connected with the bottom of the inner cylinder 10 and the longitudinal sliding block 41; the side of the longitudinal slider 41 facing the side wall of the inner cylinder 10 is provided with a pulley 71 to reduce frictional resistance during longitudinal movement.
Further, as shown in fig. 2, the second transverse sliding groove is formed by enclosing two second baffles 53 oppositely arranged at the bottom of the outer cylinder 20 and the bottom of the outer cylinder 20 between the two second baffles 53; the bottom of the second transverse sliding block 51 is provided with a pulley 71; a slideway 72 matched with the pulley 71 of the second transverse sliding block 51 is arranged on the bottom of the outer barrel 20 between the two second baffles 53 to realize the functions of limiting and reducing friction.
Further, as shown in fig. 2, the inner wall of the outer cylinder 20 is provided with side wall rollers 21 which are in rolling contact with the outer wall of the inner cylinder 10 to reduce frictional resistance when the inner cylinder 10 moves longitudinally within the outer cylinder 20.
Further, as shown in fig. 6, the cross-sections of the inner cylinder 10 and the outer cylinder 20 are rectangular; the number of the longitudinal nonlinear bearing modules is four, and the longitudinal nonlinear bearing modules are respectively arranged at four corners of the rectangle, so that the inner cylinder 10 can be more stably supported.
Further, as shown in fig. 2, the test device for simulating the longitudinal-transverse nonlinear bearing stiffness of the foundation further comprises a cover plate 22 for closing the opening of the outer cylinder 20; the cover plate 22 is provided with a through hole through which the upper structural column 100 passes.
Further, the inner periphery of the separator box 42 fits the outer periphery of the superstructure column 100, comprising two separable boxes; the central lines of the upper structure upright posts 100 of the two boxes are symmetrically sleeved on the upper structure upright posts 100 by taking the central lines as symmetry axes and are connected through split bolts.
Example 2
When the horizontal load is eccentric, an additional torque is generated, the upper structure upright 100 is twisted, and the gear 32 is driven to rotate, the gear 32 engaged with the upper structure upright is horizontally moved, and the first transverse sliding block 35 is pressed, so that a pair of opposite constraint force couples are exerted on the gear 32. In the embodiment, the experimental device for simulating the longitudinal-transverse nonlinear bearing stiffness of the foundation in the embodiment 1 is used as the basis to deduce the column restraining torque when a horizontal eccentric load is applied to the upper structural column 100TCorner with the columnαThe functional relationship of (a).
As shown in FIG. 7, when the base support stiffness is linear, i.e. the first horizontal sliding block 35 is simplified from a curved surface to a slope, the column restrains the torqueTCorner with the columnαThe functional relationship of (c) is derived as follows (the arrow direction in the figure is the compression direction of the spring 60):
in the direction of movement of the spring 60xThe axis, the moving direction of the hemispherical tamper head isyA shaft;
set the inclined plane slide block inclination angle asθThe spring 60 has a stiffness ofkThe hemispherical tamping head is subject to the counter force ofF y The spring pressure isF x Produced by extrusion of a hemispherical ram against a sloping slideyThe direction displacement (or the displacement of the hemispherical tamper head) isyOf inclined-plane slidesxThe shaft displacement isxEasy to knowx、yThe following relationships exist:
the inclined plane slide block is arranged atxThe force applied to the shaft andF x are of equal size and in opposite directions, inyThe force to which the shaft is subjectedF y One half of the size and the opposite direction, according to the analysis of the stress,
substituting the formula (1) into the formula (2),
in the formula (I), the compound is shown in the specification,
is a hemispherical tamperyDirectional stiffness, whereinkAndθis a constant;
let gear 32 have a radius ofRProduced by extrusion of a hemispherical ram against a sloping slideyAxial displacementyI.e. the length of the arc of rotation of the edge of the gear 32, then
Substituting the formula (4) into the formula (3),
column restraint torqueTCorner with the columnαThe final relationship of (a) is:
in the formula (6), the reaction mixture is,
the column torsional constraint rigidity is constant, and the column constraint torque is shownTCorner with the columnαAnd has a linear relationship.
On the basis of the derivation process, when the derivation base supporting rigidity is nonlinear, the column constraint torqueTCorner with the columnαFunctional relationship (arrow direction in the figure is compression direction of spring 60):
as shown in FIG. 8 or FIG. 9, a coordinate system is established with the vertex or center of the first lateral slider 35 as the origin, and a slider curve function is set as
x=f(y)(7)
The contact point of the first transverse sliding block 35 and the hemispherical tamping head in the initial state is set asA(X 0 , Y 0 ) When the first transverse sliding block 35 is extruded by the hemispherical tamping headyPositive axial direction movement △yIs a distance ofxNegative axial direction of movement △xAfter a distance of (2), the contact point at this timeB(X 0 ,Y 0 +△y) Tangent line andxincluded angle of axis ofθSetting the contact point in the initial stateAToxThe vertical distance of the shaft beingtThen there is
f(Y 0 )=t(8)
According to FIG. 8 or FIG. 9, there are
△x=f(Y 0 +△y)-f(Y 0 ) (9)
And is provided with
In the case of non-linearityF y =2kx/tanθStill hold, then have
The formula (11) is a general relational expression of the force and displacement of the hemispherical ramming head, and when the curve function of the first transverse sliding block 35 is known, the curve function can be obtainedF y And △yThe specific relationship between them.
As shown in FIG. 8, the first lateral slider 35 has a curve function ofy=x 2When it is, then
From the formula (9)
Simultaneously obtained by the formula (10)
By substituting formula (12) and formula (13) for formula (11)
In the initial state of the process, the temperature of the molten steel is controlled,
then there isY 0 =t 2 Is substituted by formula (14) and finished to obtain
Is obtained by the formula (4),
is substituted into the above formula to obtain
Then the upright post restrains and twistsMomentTCorner with the columnαThe final relationship of (a) is:
in the formula (I), the compound is shown in the specification,a，t，kare all constants, when the slide block is set into a curved surface form, the upright posts restrain torqueTCorner with the columnαThe relationship between the two is a nonlinear function relationship.
As shown in FIG. 9, the first lateral slider 35 has a curve function ofx 2 +y 2 =a 2 When is at time
Then, it can be obtained from the formula (9)
Simultaneously obtained by the formula (10)
By substituting formula (18) and formula (19) for formula (11)
In the initial state, the formula (8) shows,
then there is
Is substituted by formula (18) and finished to obtain
Is obtained by the formula (4),
is substituted into the above formula to obtain
Column restraint torqueTCorner with the columnαThe final relationship of (a) is:
in the formula (I), the compound is shown in the specification,a，t，kare all constants, when the slide block is set into a curved surface form, the upright posts restrain torqueTCorner with the columnαThe relationship between the two is a nonlinear function relationship.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, or direct or indirect applications in other related fields, which are made by the contents of the present specification, are included in the scope of the present invention.
Claims (10)
1. A test device for simulating the longitudinal-transverse nonlinear supporting rigidity of a foundation is characterized in that: the device comprises an inner cylinder (10) and an outer cylinder (20) with open top ends, a torsional nonlinear support module, a transverse nonlinear support module and a longitudinal nonlinear support module;
the inner cylinder (10) is sleeved in the outer cylinder (20) and can move longitudinally in the outer cylinder (20);
the torsional nonlinear support module comprises a tray (31), a gear (32), a first transverse sliding groove (33), a sleeve box (34), a first transverse sliding block (35) and a toothed bar (36);
the tray (31) is arranged in the inner cylinder (10) in a rolling manner and is used for fixing an upper structure upright post (100);
the gear (32) is fixedly sleeved on the tray (31);
the number of the first transverse sliding grooves (33) is two, the first transverse sliding grooves are symmetrically arranged in the inner cylinder (10) by taking the central line of the upper structure upright post (100) as a symmetry axis, and the opening faces the upper structure upright post (100);
the side surface of the sleeve box (34) close to the upper structure upright post (100) and the side surface of the sleeve box far away from the upper structure upright post (100) are provided with through openings, and the two sleeve boxes (34) are connected through a connecting rod (37) and are arranged in the same first transverse sliding groove (33) in a sliding manner;
the curved surfaces of the two first transverse sliding blocks (35) are oppositely arranged and are connected with the inner wall of the sleeve box (34) through springs (60), and the first transverse sliding blocks (35) extend out of through holes in the side surface of the sleeve box (34) far away from the upper structure upright post (100) to be in contact with the first transverse sliding grooves (33);
the toothed bar (36) is meshed with the gear (32) through a sawtooth part on a bar body, two ends of the toothed bar extend into the sleeve box (34) from a through hole on the side surface of the sleeve box (34) close to the upper structure upright post (100), and a hemispherical tamping head used for extruding the first transverse sliding block (35) is arranged;
the transverse nonlinear supporting module comprises a longitudinal sliding groove, a longitudinal sliding block (41), a separating box (42) and a transverse loading rod (43);
the longitudinal sliding grooves are symmetrically arranged in the inner cylinder (10) by taking the central line of the upper structure upright post (100) as a symmetry axis, and the opening of the longitudinal sliding grooves faces the upper structure upright post (100);
the curved surfaces of the two longitudinal sliding blocks (41) are oppositely arranged and are connected with the inner wall of the longitudinal sliding groove through a spring (60);
the separation box (42) is sleeved on the upper structure upright post (100);
the first end of the transverse loading rod (43) is fixed on the separation box (42), and the second end of the transverse loading rod is provided with a hemispherical tamping head for extruding the longitudinal sliding block (41);
the longitudinal nonlinear supporting module comprises a second transverse sliding chute, a second transverse sliding block (51) and a longitudinal loading rod (52);
the second transverse sliding groove is arranged in the outer cylinder (20), and the opening of the second transverse sliding groove faces to the bottom of the inner cylinder (10);
the curved surfaces of the two second transverse sliding blocks (51) are arranged oppositely and are connected with the inner wall of the second transverse sliding chute through a spring (60);
the first end of the longitudinal loading rod (52) is fixed at the bottom of the inner cylinder (10), and the second end of the longitudinal loading rod is provided with a hemispherical tamping head used for extruding the second transverse sliding block (51).
2. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 1, characterized in that the bottom surface of the tray (31) is provided with a downwardly convex annular barrier layer;
and a ball (38) is arranged in a space enclosed by the annular barrier layer and the bottom of the inner cylinder (10).
3. A test rig for simulating fundamental longitudinal-transverse nonlinear bearing stiffness in accordance with claim 2, characterized in that the top surface of the tray (31) is provided with an outwardly protruding annular mounting for connection with the gear wheel (32).
4. A test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness as claimed in any one of claims 1-3, wherein the first transverse runner (33) and the cartridge (34) are each a rectangular box;
the side surface of the sleeve box (34) contacted with the inner wall of the first transverse sliding groove (33), the side surface of the first transverse sliding block (35) contacted with the inner wall of the sleeve box (34) and the side surface of the first transverse sliding block (35) extending out of the sleeve box (34) and contacted with the inner wall of the first transverse sliding groove (33) are provided with pulleys (71);
and the inner walls of the first transverse sliding groove (33) and the sleeve box (34) are provided with sliding ways (72) matched with the pulleys (71).
5. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 4, wherein the longitudinal sliding chute is enclosed by a first baffle (44) arranged in the inner cylinder (10), the bottom of the inner cylinder (10) and the side wall of the inner cylinder (10) between the first baffle (44) and the bottom of the inner cylinder (10);
the spring (60) arranged in the longitudinal sliding groove comprises a first spring and a second spring, two ends of the first spring are respectively connected with the first baffle (44) and the longitudinal sliding block (41), and two ends of the second spring are respectively connected with the bottom of the inner cylinder (10) and the longitudinal sliding block (41);
and a pulley (71) is arranged on the side surface of the longitudinal sliding block (41) facing the side wall of the inner cylinder (10).
6. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 5, wherein the second transverse sliding chute is enclosed by two second baffles (53) oppositely arranged at the bottom of the outer cylinder (20) and the bottom of the outer cylinder (20) between the two second baffles (53);
a pulley (71) is arranged at the bottom of the second transverse sliding block (51);
a slide way (72) matched with the pulley (71) of the second transverse sliding block (51) is arranged at the bottom of the outer cylinder (20) between the two second baffles (53).
7. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 1, characterized in that the inner wall of the outer cylinder (20) is provided with side wall rollers (21) which are in rolling contact with the outer wall of the inner cylinder (10).
8. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 1 or 7, characterized in that the cross section of the inner cylinder (10) and the outer cylinder (20) is rectangular;
the number of the longitudinal nonlinear supporting modules is four, and the longitudinal nonlinear supporting modules are respectively arranged at four corners of a rectangle.
9. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 1, further comprising a cover plate (22) for closing an opening of the outer cylinder (20);
the cover plate (22) is provided with a through hole for the upper structure upright post (100) to pass through.
10. The test device for simulating fundamental longitudinal-transverse nonlinear bearing stiffness according to claim 1, characterized in that the inner circumferential surface of the separation box (42) is fitted with the outer circumferential surface of the superstructure column (100) and comprises two separable box bodies;
the two boxes are symmetrically sleeved on the upper structure upright post (100) by taking the central line of the upper structure upright post (100) as a symmetry axis and are connected through split bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117710.0A CN108414686B (en) | 2018-02-06 | 2018-02-06 | Test device for simulating longitudinal-transverse nonlinear supporting rigidity of foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117710.0A CN108414686B (en) | 2018-02-06 | 2018-02-06 | Test device for simulating longitudinal-transverse nonlinear supporting rigidity of foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108414686A CN108414686A (en) | 2018-08-17 |
| CN108414686B true CN108414686B (en) | 2020-06-09 |
Family
ID=63127790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810117710.0A Active CN108414686B (en) | 2018-02-06 | 2018-02-06 | Test device for simulating longitudinal-transverse nonlinear supporting rigidity of foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108414686B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736364B (en) * | 2018-10-14 | 2022-06-07 | 中国科学院武汉岩土力学研究所 | Calcareous sand pile foundation model test system capable of simulating wind wave torsion action |
| CN109974593B (en) * | 2019-04-01 | 2020-09-25 | 太原理工大学 | Testing device and testing method for simulating expansion of soil body column hole |
| CN112660553A (en) * | 2020-11-26 | 2021-04-16 | 中国电建集团成都勘测设计研究院有限公司 | Undisturbed soil sample conveying device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070052089A (en) * | 2005-11-16 | 2007-05-21 | 주식회사 삼보지반기술 | Support load measurement way of concrete pail and the installation established on base |
| CN203716191U (en) * | 2014-01-02 | 2014-07-16 | 河南科技大学 | Experiment device for simulating load borne by model pile foundation |
| CN204435438U (en) * | 2015-01-05 | 2015-07-01 | 福州大学 | The steel jacket box of secondary load in the vertical accumulated loading test in cushion cap top |
| CN105002919A (en) * | 2015-07-29 | 2015-10-28 | 厦门理工学院 | System for enabling prefabricated bearing platform and multiple fixed steel pipe piles to be mutually positioned and positioning process thereof |
| CN106500959A (en) * | 2016-11-03 | 2017-03-15 | 东北石油大学 | A kind of device for simulating ocean environment load |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3790180B2 (en) * | 2002-03-26 | 2006-06-28 | 財団法人鉄道総合技術研究所 | Loading test equipment |
-
2018
- 2018-02-06 CN CN201810117710.0A patent/CN108414686B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070052089A (en) * | 2005-11-16 | 2007-05-21 | 주식회사 삼보지반기술 | Support load measurement way of concrete pail and the installation established on base |
| CN203716191U (en) * | 2014-01-02 | 2014-07-16 | 河南科技大学 | Experiment device for simulating load borne by model pile foundation |
| CN204435438U (en) * | 2015-01-05 | 2015-07-01 | 福州大学 | The steel jacket box of secondary load in the vertical accumulated loading test in cushion cap top |
| CN105002919A (en) * | 2015-07-29 | 2015-10-28 | 厦门理工学院 | System for enabling prefabricated bearing platform and multiple fixed steel pipe piles to be mutually positioned and positioning process thereof |
| CN106500959A (en) * | 2016-11-03 | 2017-03-15 | 东北石油大学 | A kind of device for simulating ocean environment load |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108414686A (en) | 2018-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108414686B (en) | Test device for simulating longitudinal-transverse nonlinear supporting rigidity of foundation | |
| JP6622411B2 (en) | Periodic structure used for three-way motion decoupling of shaking table model box | |
| US6729189B2 (en) | Method and apparatus for measuring packing properties | |
| CN204480577U (en) | A kind of parallel Dual Drive emulation platform of simulated vehicle low-and high-frequency motion | |
| Lee et al. | Seismic response characteristics of high-rise RC wall buildings having different irregularities in lower stories | |
| US7540117B2 (en) | Vibration isolation system for building | |
| US20060000159A1 (en) | Foundation shock eliminator | |
| CN106323750A (en) | Variable ground pressure tunnel excavating load experiment platform | |
| DE112017000472T5 (en) | LOAD MEASURING SYSTEM AND LOAD MEASURING METHOD FOR A MOTION GUIDANCE APPARATUS AND METHOD FOR CALCULATING THE LIFE OF A MOTION GUIDANCE APPARATUS | |
| US11486804B1 (en) | Device for simulating full-scale pile-sinking process of static pressure pile by air bag preloading and test method thereof | |
| CN107907286A (en) | A kind of new unsymmetrial loading tunnel Research on Shaking Table for Simulating system | |
| CN110658087A (en) | Piezoelectric road test device under simulation traffic load effect | |
| CN113049395A (en) | Simulation device for composite stress mechanism of pile foundation of liquefied field and test method thereof | |
| Calhoun et al. | Enhancing the teaching of seismic isolation using additive manufacturing | |
| CN101776554A (en) | Electro-hydraulic servo control electroporcelain bending-torsion testing machine | |
| CN113984408B (en) | Comprehensive road condition simulation system for automobile transmission test | |
| CN111660280B (en) | 3UCU+PU three-degree-of-freedom stable platform | |
| CN110308263B (en) | Coarse-grained soil compression test pressure chamber | |
| CN215249447U (en) | Dedicated turning device of electromechanical device installation | |
| CN111142568A (en) | Object position adjusting device | |
| CN112362370B (en) | Simple steering engine load testing device | |
| CN108385738B (en) | Torque loading device and method for simulating pile top linear stiffness constraint | |
| CN114047070A (en) | A test device for testing wire rope performance | |
| GUO et al. | Response of axially loaded pile groups subjected to lateral soil movement-An expremental investigation | |
| Kutter et al. | Physical modelling of dynamic behavior of soil-foundation-superstructure systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |